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Effects of intraspecific density and environmental variables on electrofishing catchability of brown and rainbow trout in the Colorado River

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Speas, David W, Walters, Carl J, Ward, David L, and Rogers, R Scott, Effects of intraspecific density and environmental variables on electrofishing catchability of brown and rainbow trout in the Colorado River: .

Summary

We investigated electrofishing catchability (q) for brown trout Salmo trutta and rainbow trout Oncorhynchus mykiss in the Colorado River, Grand Canyon National Park, Arizona, over a range of fish densities, water temperatures, turbidities, conductivities, shoreline types, and seasons. The covariance of q with rainbow trout density strongly resembled random distributions, thereby suggesting no relationship between q and rainbow trout density. The catchability of rainbow trout was greater in turbid water (?480 nephelometric turbidity units [NTU]) than in clear water (?10 NTU), although lower water temperature may have contributed to this effect. The catchability of rainbow trout was greatest over sand?silt shorelines. The catchability [...]

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  • Upper Colorado River Basin

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From Source - Mendeley RIS Export <br> On - Wed Sep 19 08:03:42 MDT 2012

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Title Citation Effects of intraspecific density and environmental variables on electrofishing catchability of brown and rainbow trout in the Colorado River

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